oracle教程32 包（子程序重载）

灰太狼 2022-05-27 06:59 170阅读 0赞

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直接上代码吧

--根据员工号或员工姓名获取员工的信息
    --根据员工号或员工姓名删除员工的信息
    --创建包规范
    CREATE OR REPLACE PACKAGE overload_pkg
    IS
           FUNCTION get_info(eno NUMBER) RETURN emp%ROWTYPE;
           FUNCTION get_info(name VARCHAR2) RETURN emp%ROWTYPE;
           
           PROCEDURE del_emp(eno NUMBER);
           PROCEDURE del_emp(name VARCHAR2);
    END;

--创建包体
    CREATE OR REPLACE PACKAGE BODY overload_pkg
    IS
           FUNCTION get_info(eno NUMBER) RETURN emp%ROWTYPE
           IS
                    emp_record  emp%ROWTYPE;
           BEGIN
                    SELECT * INTO emp_record FROM emp WHERE empno = eno;
                    RETURN emp_record;    
           EXCEPTION
                    WHEN NO_DATA_FOUND THEN
                         RAISE_APPLICATION_ERROR(-20020,'不存在此员工！');
           END;
           
           FUNCTION get_info(name VARCHAR2) RETURN emp%ROWTYPE
           IS 
                    emp_record  emp%ROWTYPE;
           BEGIN
                    SELECT * INTO emp_record FROM emp WHERE ename = name;
                    RETURN emp_record; 
           EXCEPTION
                    WHEN NO_DATA_FOUND THEN
                         RAISE_APPLICATION_ERROR(-20020,'不存在此员工！');
           END;       
           
           PROCEDURE del_emp(eno NUMBER)
           IS
           BEGIN
                     DELETE FROM emp WHERE empno = eno;
                     IF SQL%NOTFOUND THEN
                        RAISE_APPLICATION_ERROR(-20020,'不存在此员工');
                     END IF;
           END;
           
           PROCEDURE del_emp(name VARCHAR2)
           IS
           BEGIN
                     DELETE FROM emp WHERE ename = name;
                     IF SQL%NOTFOUND THEN
                        RAISE_APPLICATION_ERROR(-20020,'不存在此员工');
                     END IF;
           END;
    END;

调用：

--调用
    --根据员工号查询员工信息
    DECLARE
           emp_record emp%rowtype;
           e_no_emp  EXCEPTION;
           PRAGMA EXCEPTION_INIT(e_no_emp,-20020);
    BEGIN
           emp_record:= overload_pkg.get_info(&no);
           DBMS_OUTPUT.PUT_LINE('员工号：'||emp_record.empno||'姓名：'||emp_record.ename||'工资：'||emp_record.sal);
    EXCEPTION
           WHEN e_no_emp THEN
                DBMS_OUTPUT.put_line(SQLERRM);
    END;
    
    --根据员工姓名查询员工信息
    DECLARE
           emp_record emp%rowtype;
           e_no_emp  EXCEPTION;
           PRAGMA EXCEPTION_INIT(e_no_emp,-20020);
    BEGIN
           emp_record:= overload_pkg.get_info('&name');
           DBMS_OUTPUT.PUT_LINE('员工号：'||emp_record.empno||'姓名：'||emp_record.ename||'工资：'||emp_record.sal);
    EXCEPTION
           WHEN e_no_emp THEN
                DBMS_OUTPUT.put_line(SQLERRM);
    END;
    
    --根据员工号删除员工信息
    DECLARE
           e_no_emp EXCEPTION;
           PRAGMA EXCEPTION_INIT(e_no_emp, -20020);
    BEGIN
           overload_pkg.del_emp(&no);
           COMMIT;
    EXCEPTION
           WHEN e_no_emp THEN
                DBMS_OUTPUT.put_line(SQLERRM);
           ROLLBACK;
    END;  
    
    
    
    --根据员工的姓名删除员工的信息
    DECLARE
           e_no_emp EXCEPTION;
           PRAGMA EXCEPTION_INIT(e_no_emp, -20020);
    BEGIN
           overload_pkg.del_emp('&name');
           COMMIT;
    EXCEPTION
           WHEN e_no_emp THEN
                DBMS_OUTPUT.put_line(SQLERRM);
           ROLLBACK;
    END;

[70]: /images/20220527/996bddd22b99497aa35c165992d81992.png